[RFI] Tower/Antenna Reradiation

[David Eckhardt]

I will not engage in a shooting contest.

All ferrites have a relatively wide tolerance on characteristics.

Dave - W ØLEV

On Wed, Dec 22, 2021 at 9:56 PM Jim Brown <jim at audiosystemsgroup.com> wrote:

> I spent years. #43 is NOT a good material for HF because of
> manufacturing tolerances. The problem is that we must measure each choke
> to take tolerances into account, but correct measurement is a
> destructive process. I measured at least a thousand chokes, wound on
> cores at the limits of component tolerances.
>
> See the discussion in
> http://k9yc.com/2018Cookbook.pdf
>
> 73, Jim K9YC
>
>
> On 12/22/2021 1:21 PM, David Eckhardt wrote:
> > Yes, 31 material is the preferred material, especially for 160 and 75/80
> > meters.  40-meters is roughly the break-even frequency.  15-meters on
> > upward, yes, 43 material is best.  I spent almost the whole month of
> > January and into February measuring various CMCs using both 43 and 31
> > material.
>
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-- 
*Dave - WØLEV*
*Just Let Darwin Work*